1. Meningitis and Vaccine Preventable Diseases Branch, Division of Bacterial Diseases, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia
2. California Emerging Infections Program, Oakland, California
3. Emerging Infections Program, Communicable Disease Branch, Colorado Disease Control and Environmental Epidemiology Division, Denver, Colorado
4. Connecticut Department of Public Health Epidemiology Program, Hartford, Connecticut
5. Emory University School of Medicine and the Atlanta VAMC, Atlanta, Georgia
6. Departments of Epidemiology and Medicine, University of Pittsburgh, Pittsburgh, Pennsylvania
7. Emerging Infections Unit, Acute Disease Investigations and Control Section, Minnesota Department of Health, St. Paul, Minnesota
8. New York State Department of Health Emerging Infections Program, Albany, New York
9. Oregon Health Authority, Portland, Oregon
10. Office of the Director, National Center for Immunization and Respiratory Diseases, Centers for Disease Control and Prevention, Atlanta, Georgia